mydlyfkryzis said:The original disk is on e-bay: http://www.ebay.com/itm/HONDA-CB125-CB-125-CB125S-NICE-CB200-200-CB200T-FRONT-BRAKE-CALIPER-/271919602810?hash=item3f4fabdc7a&vxp=mtr
You will have to change the hub and spokes to use a drum brake....You probably do better to find another comaptible bike and change the fork too. This way you have all the correct mounting points.